#include<iostream>
#include<vector>
#include<queue>
#include<cstring>
#include<cmath>
#include<map>
#include<set>
#include<cstdio>
#include<algorithm>
#define debug(a) cout<<#a<<"="<<a<<endl;
using namespace std;
const int maxn=2e5+1000;
typedef long long LL;
inline LL read(){LL x=0,f=1;char ch=getchar();	while (!isdigit(ch)){if (ch=='-') f=-1;ch=getchar();}while (isdigit(ch)){x=x*10+ch-48;ch=getchar();}
return x*f;}
map<double,int>map1;
long long interchangeableRectangles(vector<vector<int>>& r) {
    map1.clear();
    for(int i=0;i<r.size();i++)
    {
        double w=1.0*r[i][0];double h=1.0*r[i][1];
        map1[1.0*w/h]++;
    }
    long long ans=0;
    for(auto i:map1)
    {
        ans+=i.second;
    }
    return ans;
}
int main(void){


   	return 0;
}
